Absolutely appalling

It has been an absolute nightmare! I paid off my contract early, paid and sent documents (SENT 16 TIMES!!) then I get handed over to Lawyers.. Finally get it sorted out after the 17th attempt(or so I thought). They eventually send me the Credit Note to offset my account but credited 4cents too little so I keep getting a Statement showing I owe 4cents.. I tried paying, Account does not exist... NOW I get a notification saying that my account is on a Prepaid Flexi plan which I now have to pay R85 monthly on BECAUSE I OWE 4CENTS!! Pathetic..